<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
		<img src="img/photo10.jpg"/>
	</body>
	<script type="text/javascript" src="js/jquery-1.11.0.js"></script>
	<script type="text/javascript">
		var num=0
	   $('img').click(function(){
	   	  if(num%2==0){
	   	  	$(this).attr('src','img/ps.png')
	   	  }else{
	   	  	$(this).attr('src','img/photo10.jpg')
	   	  }
	   	  num++
	   })
	</script>
</html>
